6680831649 has 8 divisors (see below), whose sum is σ = 9431762400. Its totient is φ = 4191894336.

The previous prime is 6680831617. The next prime is 6680831659. The reversal of 6680831649 is 9461380866.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6680831649 - 2⁵ = 6680831617 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51), and also a Moran number because the ratio is a prime number: 130996699 = 6680831649 / (6 + 6 + 8 + 0 + 8 + 3 + 1 + 6 + 4 + 9).

It is not an unprimeable number, because it can be changed into a prime (6680831659) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65498299 + ... + 65498400.

It is an arithmetic number, because the mean of its divisors is an integer number (1178970300).

Almost surely, 2^6680831649 is an apocalyptic number.

It is an amenable number.

6680831649 is a deficient number, since it is larger than the sum of its proper divisors (2750930751).

6680831649 is a wasteful number, since it uses less digits than its factorization.

6680831649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130996719.

The product of its (nonzero) digits is 1492992, while the sum is 51.

The square root of 6680831649 is about 81736.3545125423. The cubic root of 6680831649 is about 1883.4040906683.

The spelling of 6680831649 in words is "six billion, six hundred eighty million, eight hundred thirty-one thousand, six hundred forty-nine".